# A nurse is caring for a 68-year-old patient with chronic obstructive pulmonary disease (COPD) who was admitted 2 days ago for an exacerbation. The patient's condition has been stable, but the nurse notices subtle changes during the morning assessment. Which finding should be the nurse's PRIORITY concern indicating potential rapid deterioration?

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## 문제

A nurse is caring for a 68-year-old patient with chronic obstructive pulmonary disease (COPD) who was admitted 2 days ago for an exacerbation. The patient's condition has been stable, but the nurse notices subtle changes during the morning assessment. Which finding should be the nurse's PRIORITY concern indicating potential rapid deterioration?

## 보기

1. Decreased appetite and refusal to eat breakfast this morning
2. New onset of restlessness and mild confusion with increased respiratory rate **✔ 정답**
3. Complaint of increased fatigue and wanting to sleep more than usual
4. Blood pressure increase from 130/80 to 140/85 mmHg

**정답: 2**

## 해설

Restlessness and confusion are early signs of hypoxemia in COPD, and increased respiratory rate indicates distress, making this the priority. Other findings (appetite change, fatigue, mild BP increase) are less urgent.

## 심화 해설

Clinical Reasoning and Prioritization

The nurse’s priority concern is the new onset of restlessness and mild confusion with increased respiratory rate. In a patient with COPD exacerbation, these subtle neurological changes are not merely signs of anxiety or fatigue; they are often the earliest clinical indicators of hypoxemia or hypercapnia signaling impending respiratory failure. While a patient with stable COPD may have a chronic compensated respiratory acidosis, an acute change in mental status alongside an elevated respiratory rate suggests that the patient’s compensatory mechanisms are failing. This requires immediate assessment of oxygen saturation, arterial blood gases, and potential escalation of respiratory support.

The link between cognitive function and clinical deterioration in COPD is critical. The provided evidence establishes that cognitive impairment is not just a static comorbidity but a dynamic marker of systemic burden and disease control failure [1]. When a patient with moderate-to-severe disease develops acute confusion, it reflects the brain's high sensitivity to fluctuations in oxygenation and carbon dioxide levels. Furthermore, this acute cognitive change directly threatens patient safety because it is consistently associated with an increased risk of mortality and impaired self-management capacity [2]. A confused patient cannot effectively participate in their care, use inhalers correctly, or signal distress, making rapid intervention essential to prevent a cascade of deterioration.

Analysis of Other Options

Option 1: Decreased appetite and refusal to eat breakfast. While poor nutritional intake can contribute to muscle wasting and long-term decline in COPD, it is a chronic management issue rather than a sign of acute, life-threatening deterioration. It does not take priority over neurological changes indicating possible respiratory failure.

Option 3: Complaint of increased fatigue and wanting to sleep more. Increased fatigue is a common and expected symptom during a COPD exacerbation due to the increased work of breathing and systemic inflammation. However, unless this fatigue progresses to a pathological change in consciousness (such as the confusion noted in Option 2), it is a lower priority. The key differentiator is the acute change in mentation.

Option 4: Blood pressure increase from 130/80 to 140/85 mmHg. This represents a mild elevation in blood pressure. In the context of respiratory distress, a slight increase in blood pressure can be a physiological response to anxiety or increased work of breathing. This finding requires monitoring but is not the immediate priority compared to a change in neurological status, which is a more direct indicator of cerebral hypoxia or hypercapnia.References (research sources)

- [1]Cognitive Impairment as a Putative Mechanism of Self-Management Failure in Chronic Obstructive Pulmonary Disease: A Conceptual Narrative Review.Research articleAlmulhem MM, Siraj RA. (2026) · DOI: 10.3390/jcm15093550

- [2]Recognition and Management of Cognitive Impairment in Chronic Obstructive Pulmonary Disease (COPD): Implications of Clinical Confidence.Research articleSiraj RA. (2026) · DOI: 10.3390/medicina62030438

## 임상 시나리오

COPD: Recognizing Impending Respiratory FailureMental status change is a sentinel sign
In a patient with COPD exacerbation, a new onset of restlessness or confusion accompanied by an increased respiratory rate is a critical early warning sign. This reflects the brain's high sensitivity to hypoxemia and hypercapnia, indicating that compensatory mechanisms are failing.

Prioritize immediate assessment of oxygen saturation and arterial blood gases. Do not attribute these changes solely to anxiety or fatigue. A confused patient is at high risk for impaired self-management and rapid clinical deterioration.

CautionAny acute alteration in mental status in a COPD patient is a medical emergency. Delaying escalation of respiratory support while awaiting lab results can lead to respiratory arrest. Monitor closely for a rising PaCO2 level.

## 핵심 개념

- **Hypoxemia** — Abnormally low level of oxygen in the blood, a common trigger for restlessness and confusion in COPD exacerbation.
- **Hypercapnia** — Elevated carbon dioxide levels in the blood, which can cause cerebral vasodilation, confusion, and somnolence in respiratory failure.
- **COPD Exacerbation** — An acute worsening of respiratory symptoms in a patient with chronic obstructive pulmonary disease, often triggered by infection.
- **Restlessness** — An early, subtle neurological sign of cerebral hypoxia that often precedes more obvious signs of respiratory distress.
- **Compensatory Mechanisms** — Physiological responses (e.g., increased respiratory rate) that attempt to maintain normal blood gas levels but can fail acutely.

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